LANSING, Mich. — Democratic Gov. Gretchen Whitmer holds a 9 percentage point lead over Republican challenger Tudor Dixon in the final days of the race to see who will lead Michigan for the next four years, according to a new poll sponsored by The Detroit News and WDIV-TV. In the survey of 600 likely voters in the Nov. 8 general election, 52% said they would vote for Whitmer, 43% said they supported Dixon, 3% backed a third-party candidate and 2% were undecided. The poll, conducted Oct. 26-28 by the Lansing-based Glengariff Group, had a margin of error of plus or minus 4 percentage points. The …